Transfer pump



FIG. 1 is a front perspective view of the transfer pump;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right elevation view thereof;

FIG. 6 is a left elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines showing environment are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a transfer pump, as shown and described. 